Fix/cache

kraken/lib/src/devtools/module.dart

@@ -45,7 +45,7 @@ abstract class UIInspectorModule extends _InspectorModule {
 
   @override
   void sendEventToFrontend(InspectorEvent event) {
-    devtoolsService.isolateServerPort!.send(event);
+    devtoolsService.isolateServerPort?.send(event);
   }
 }
 

kraken/lib/src/foundation/http_cache.dart

@@ -102,12 +102,17 @@ class HttpCacheController {
   // Add or update the httpCacheObject to memory cache.
   void putObject(Uri uri, HttpCacheObject cacheObject) {
     if (_caches.length == _maxCachedObjects) {
-        _caches.remove(_caches.lastKey());
+      _caches.remove(_caches.lastKey());
     }
     final String key = _getCacheKey(uri);
     _caches.update(key, (value) => cacheObject, ifAbsent: () => cacheObject);
   }
 
+  void removeObject(Uri uri) {
+    final String key = _getCacheKey(uri);
+    _caches.remove(key);
+  }
+
   Future<HttpClientResponse> interceptResponse(
       HttpClientRequest request,
       HttpClientResponse response,
@@ -132,7 +137,11 @@ class HttpCacheController {
       );
 
       // Cache the object.
-      putObject(request.uri, cacheObject);
+      if (cacheObject.valid) {
+        putObject(request.uri, cacheObject);
+      } else {
+        removeObject(request.uri);
+      }
 
       return HttpClientCachedResponse(response, cacheObject);
     }

kraken/lib/src/foundation/http_cache_object.dart

@@ -146,13 +146,17 @@ class HttpCacheObject {
 
   /// Read the index file.
   Future<void> read() async {
-    if (_valid) return;
-    final bool isIndexFileExist = await _file.exists();
-    if (!isIndexFileExist) {
-      // Index file not exist, dispose.
+    // Make sure file exists, or causing io exception.
+    if (!await _file.exists() || !await _blob.exists()) {
+      _valid = false;
       return;
     }
 
+    // If index read before, ignoring to read again.
+    // Note: if index or blob file were being changed, this will make chaos,
+    //   usually this is an abnormal operation.
+    if (_valid) return;
+
     try {
       Uint8List bytes = await _file.readAsBytes();
       ByteData byteData = bytes.buffer.asByteData();
@@ -286,6 +290,10 @@ class HttpCacheObject {
     // Store shorted response headers, 4B.
     writeString(bytesBuilder, headers ?? '', 4);
 
+    // In case of cache object file is deleted by accident.
+    if (!await _file.exists()) {
+      await _file.create(recursive: true);
+    }
     // The index file will not be TOO LARGE,
     // so take bytes at one time.
     await _file.writeAsBytes(bytesBuilder.takeBytes(), flush: true);

kraken/lib/src/foundation/http_client_request.dart

@@ -158,7 +158,7 @@ class ProxyHttpClientRequest extends HttpClientRequest {
         }
 
         // Step 3: Handle negotiate cache request header.
-        if (headers.ifModifiedSince == null && headers.value(HttpHeaders.ifNoneMatchHeader) == null) {
+        if (cacheObject.valid && headers.ifModifiedSince == null && headers.value(HttpHeaders.ifNoneMatchHeader) == null) {
           // ETag has higher priority of lastModified.
           if (cacheObject.eTag != null) {
             headers.set(HttpHeaders.ifNoneMatchHeader, cacheObject.eTag!);

kraken/lib/src/launcher/bundle.dart

@@ -196,12 +196,12 @@ String _resolveStringFromData(ByteData data) {
 class NetworkAssetBundle extends AssetBundle {
   /// Creates an network asset bundle that resolves asset keys as URLs relative
   /// to the given base URL.
-  NetworkAssetBundle(Uri baseUrl, {int? contextId, Map<String, String>? additionalHttpHeaders })
+  NetworkAssetBundle(Uri baseUrl, {this.contextId, Map<String, String>? additionalHttpHeaders })
       : _baseUrl = baseUrl,
         _additionalHttpHeaders = additionalHttpHeaders,
         httpClient = HttpClient();
 
-  int? contextId;
+  final int? contextId;
   final Uri _baseUrl;
   final HttpClient httpClient;
   final Map<String, String>? _additionalHttpHeaders;

kraken/test/kraken_test.dart

@@ -21,6 +21,8 @@ import 'src/css/values.dart' as css_values;
 
 import 'src/gesture/scroll_physics.dart' as scroll_physics;
 
+import 'src/launcher/bundle.dart' as bundle;
+
 // The main entry for kraken unit test.
 // Setup all common logic.
 void main() {
@@ -64,6 +66,10 @@ void main() {
     scroll_physics.main();
   });
 
+  group('launcher', () {
+    bundle.main();
+  });
+
   tearDownAll(() {
     if (tempDirectory.existsSync()) {
       tempDirectory.deleteSync(recursive: true);

kraken/test/src/launcher/bundle.dart

@@ -0,0 +1,23 @@
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:kraken/launcher.dart';
+import 'package:test/test.dart';
+
+import '../../local_http_server.dart';
+
+void main() {
+  var server = LocalHttpServer.getInstance();
+
+  group('Bundle', () {
+    test('NetworkAssetsBundle basic', () async {
+      Uri uri = server.getUri('js_over_128k');
+      // Using contextId to active cache.
+      var bundle = NetworkAssetBundle(uri, contextId: 1);
+      ByteData data = await bundle.load(uri.toString());
+      var code = utf8.decode(data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes));
+
+      expect(code.length > 128 * 1024, true);
+    });
+  });
+}